Oiling system for engines.



H. MARR/10N.

OILING SYSTEM FOR ENGINES.

APPucAHoN r|LEn1uLY13.|9x4.

Patented Feb. 12, 1918.

2 SHEETS-SHEEF l.

WTNESSES H. MARMO'N.

01L1NG SYSTEM FOR ENGINES. APPLICATION r1LE1 1uLY13.1914.

Patented 11611121918 2 SHEE'IS--SHEEI` 2.

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Q 4 f By 4% '@M MM@ HOWAR) MARMON, OF INDIANAPOLIS, INDIANA.

OILING SYSTEM FOB ENGINES.

masses.

Specification of Letters Patent.

Patent-ea Feu-12,1918.

Application filed July 13, 1914. Serial No. 850,819.

To all whom 1f/may concern:

Be it known that I, Hownnn li'AnMoN, a citizen of the United States, residing at indianapolis. in the county of Marion and State of indiana, have invented a new and useful Oiling System for Engines, of which the following is a specification.

1t is the object of my present invention to provide a more efficient oiling system for.

rotating shafts, especially the cam shafts of internal combustion engines. and the parts operated thereby, whereby the wear of the parts and the noise usually incident to their operation are much reduced.

,In carrying out my invention in an internal combustion exigirle, 1 mount the cam shaft in a closed chamber into which the .valve-operating members project, and supply oil under pressure to such chamber by the operation of the engine; and I also make hollow the reciprocating valveoperating members ope ated by the cam shaft, having them open both into the shaft-containing chamber and at their ends which bear against the vaive stems, so that oil maybe Supplied through said members to the bases ofthe valve stems to maintain a constant tilznof oil at this point. where continual tapping occurs.

rIhe accompanying drawings illustrate my invention.

In these drawings, Figure 1 is an end view, ,with some parts in section, of an internal combustion engine embodying my invention; Fig. 2 is an enlarged cross sectional View through the cam shaft and the chamber in which itl is contained; Fig. 3 is a cross sectional -view through the lower part of the engine, showing the arrangement for supplying oil under pressure -to the chamber containing the cam shaft; and Fig. 4 is a partial side view of the engine with some arts in section through the cani shaft and its containing chamber.

The crank shaft 10 of the engine is connected by suitable gearing 11 to the cam shaft 12, for driving the latter at proper speed, and the camv shaft 12 carries the necessary cams 13 which coperate with rollers 1-'1 mounted on the lower ends of reciprocatingr valve-operating members 15 the upper ends of which bear against the lower ends of valve stems 16 of the ordinary inlet and exhaust valves 17' of the engine, these valves 17 being shown. as spring-prcssed to closed position by springs 18. The valve-operating members 15 are slidabiy mounted in substantially oil-tight bearings 19, and are shown as made in two parts screw-threaded together so as to provide for adjusting their length. The valve-operating members 15 are tubular, opening at their lower ends into the chamber 20 and at their upper ends to the surface on which they are engaged bythe lower ends of the valve stems 1G.

The cam shaft 12 is mounted within a chamber or tunnel 20, the. walls of which are conveniently integral parts of the crank case 21. This chamber or tunnel extends the full length ofthe crank case, and is of proper size to receive the cam shaft and the cams thereon. There are suitable bearings at the ends of this chamber 20, for allowing the cam shaft 12 to project through for eonneC-I tion to the gears 11, and there are also a number of intermediate bearings 22 for supporting the cam shaft 12 between the various cams 13. These bearings 22 are provided with oil passages 23 extending through them from side to side, for a purpose which will appear later.

At the bottom of the crank case is an oilV well 25. the oil level in which is indicated by -1 rod 26 which projects up into a glass tube 27 and is attached at its lower end toa float 28 which rises and falls with the oil level.

. A pump 29. shown as a simple gear pump,

hasits intake 30 dipping into the oil in the oil wel'll25, and its discharge 31 leading to a pipe or tube32 which is connected to various points to be oiled and is also connected, by a pipe 33, to the chamber 20 containing the cam shaft 12. The pipe 32 also has a safety outlet 234 which is normally closed by a spring-pressed ball 35 but which opens under' sutlieient pressure to move such ball to allow the passage of oil from such pipe 32 to the oil well 25, as by way of the tube 36 through which the rod 26 extends. The pump 29 is driven in any suitable manner,

preferably from the engine itself, and is shown as having its driving shaft 37 connected by spiral gears 38 to the cam shaft 12 (see Fig. 3), so that when the engine is operating and drives the cam shaft, the cam shaft in turn drives the pump 29.

I ii

Athe wear of both rollers and cams' and the noise produced by their'eoperation are al mostK totally .eliminated Furthermore, the

oil under ressure in the chamber 20 is orce up t rough the hollow vva1ve-operat.

ing members. l5 against the lower ends of lie' valve .stems 1 6, Where the oil spreads our, between such lower ends and the upper ends or' he `ralvie-operating members 15 to form a linof o il which acts eeetively to avoid practically all the noise-which is caused by the rapping between the .members and 16. The oil which thus escapes from the chamber through the valvefoperating members @l5 passes into a chamber 40 whence it returns by way oi openings 4&1 into ihe eranla.7 ease 2l from which a fans again ini-0 than; weil,

lubricantl to said chamber and maintaining for reuse. Y

li claim as my invention: Y

1. 'In an internal combustion engine,.1tb combination of a. cam shaft having a cam thereon, a chamber in which said'oam. shaft is mounted, a vaive-operaing member projecting into said chamber 4or 'cooperating with said cam, a valve siem bearing; against said valve-operating member, said valven operating; member being lwiionfaendl -open 1 ing into sacl chamber ab@ inv *eine surface against which said valve stern bears for allowino the assage of oil from such chamber to such sur ace, and. means for supplying 013.

. to said chamber.

2. The combination of a. Valve having a. reciprocable slerln, a reci procable Valve-oper ating memberleoperating vwith said stem for operating iit,`means for reciprocating said .valve-operating member, one of said reciptherefonyalvo stems for said Valves, a cam shaft for actuating said va1ves,'a closed chamber surrounding said cam shaft, slidable valve lifters operatively engaging said valve stems and vprojecting into said charnber and"` operatively engaging the cams on the cam shaft', and means for supplying a.

the same under pressure therein.

in witness whereof I have hereunto set my hand at indianapolis, Indiana,.this 10th day of July. A. D. one thousand nine hun aired and i'ozarteen.

L. HWARD MARMUN.

Witnesses FRANK A. FAHLE, ARTHUR M. Hoon. 

